Re: Chevrolet truck gear shifting question

Posted by Billy NY on February 07, 2014 at 06:19:35 from (72.226.79.200):

In Reply to: Chevrolet truck gear shifting question posted by NCWayne on February 06, 2014 at 20:13:41:

Its funny how those 5+2's and 4+2's have gone to the wayside, do they even make them anymore ?

I've always liked them and have driven many of them. Growing up we had a Dodge D700 5+2, 2 C series ford (cabovers) same 2 spd rear, + how many others I drove as a kid in between, Ford, Chevy, and IH. I currently own a '64 F600 4+2 it has a292 y block. I drove many IH's from the loadstar series with the 345 V8 to the newer S series, S1600-1900's at the lumber yard, diesel, all with 2 spd rears.

They are all different, at the lumber yard I ran 2 S1600's IH's, both v8 diesels, 5spd was an '84, the 4 spd was an '86, both geared differently. There really seems to be no smooth way to split shift each gear going up or down. However, the 4spd IH S1600, you could go from 3rd high to 4th low, then pull the plunger switch up in 4th, and it was smooth, no real need for it, was a box truck for shipping our millwork, and that truck would fly, had tall gears in it, so the ratios were still climbing from 3rd high to 4th low, others I drove were not like that. I think 4th high on this truck you shifted 4th into high at well over 60 mph, this truck would run 90 mph or more, been so long its now hard to remember.

My old F600, you don't want to play games with split shifting, start off in low til you get to 4th, shift to high and thats it. Or if you don't need 4th, 3rd high, but thats it.

It seems to me that if you listen out the window, with most of these, you will here that hang time because while you are shifting the trans, your foot is off the accelerator, so its seems like something is not coordinated, but when you are in any gear, pull up or push down the switch, let off the accelerator, then push it back in one fluid motion, they just shift nice and easy, like a 13 spd road ranger when you split shift. When you try that while also shifting the transmission, I'd say listen to what Allan, your dad says etc. Youll either get a nice thud, or you'll hear that eaton rear in limbo and it sounds like a grinding noise, not sure if it is. I know there are data stickers under the visor on all these trucks and it has instructions, makes you think this method of shifting the rear at the same time as the trans is supposed to work, I only experienced one truck in my driving career that would do it smoothly from only 1 gear in its transmission to another gear, and that was the IH S1600 V8 diesel, box truck we had at the lumber yard I described above for our millwork. Things change with a load on, I delivered hundreds of framing orders on flatbed IH's S series both gas and diesel, and the loadstar as well, all those had 5 spds in them, try splitting those and you may find yourself with a problem, go all the way to top gear, then just switch to high, when shifting down, its top gear, to low range in the rear,then directly shift the transmission down, maybe I have missed something, but I drove for that place 4 years straight 6 days a week, often times it was one of those IH's if the tractor trailer was not needed.

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